Q. Match the following:
(P) SMTP (1) Application layer
(Q) BGP (2) Transport layer
(R) TCP (3) Data link layer
(S) PPP (4) Network layer
(5) Physical layer

• (A) P – 2 Q – 1 R – 3 S – 5
• (B) P – 1 Q – 4 R – 2 S – 3
• (C) P – 1 Q – 4 R – 2 S – 5
• (D) P – 2 Q – 4 R – 1 S – 3